Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulphur
B Boron
Fe Iron
Mn Manganese
Mo Molybdenum
Zn Zinc

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins, while a narrow area on each side of the veins remains green. The leaf margins - and with proceeding deficiency also the intercostal areas - become necrotic.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins, while a narrow area on each side of the veins remains green. The leaf margins - and with proceeding deficiency also the intercostal areas - become necrotic. The discoloration of the leaves can vary from chlorotic-yellow to purple/brown.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins, while a narrow area on each side of the veins remains green. The leaf margins - and with proceeding deficiency also the intercostal areas - become necrotic. The discoloration of the leaves can vary from chlorotic-yellow to purple/brown.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins. A narrow area on each side of the veins remains green. The leaf margins and intercostal, chlorotic areas become necrotic.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins. A narrow area on each side of the veins remains green. Later on, the leaf margins and intercostal, chlorotic areas become necrotic.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins, while a narrow area on each side of the veins remains green. The leaf margins - and with proceeding deficiency also the intercostal areas - become necrotic. The discoloration of the leaves can vary from chlorotic-yellow to purple/brown.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins. A narrow area on each side of the veins remains green. Later on, the leaf margins and intercostal, chlorotic areas become necrotic.

Reasons
Magnesium deficiency (right). Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Canola - Chlorosis

Symptoms
Magnesium deficiency always shows initially on the older leaves. Chlorosis develops between the veins, while a narrow area on each side of the veins remains green. The leaf margins - and with proceeding deficiency also the intercostal areas - become necrotic. The discoloration of the leaves can vary from chlorotic-yellow to purple/brown.

Reasons
Magnesium deficiency. Fe and Mn deficiency also show intercostal chlorosis and necrosis, but the symptoms start on younger leaves.

Magnesium deficiency made worse by

  • Sandy soils
  • Acidic soils
  • Potassium rich soils
  • Soils receiving high potash applications
  • Cold wet periods

Magnesium is important for

  • Better crop establishment
  • Reduced plant losses over winter
  • Increases nutrient levels in the crop for better spring regrowth
  • Improved flowering
  • More even maturity
  • Boosts grain yield and oil content of seed

Yara recommended fertilizers for Magnesium

YaraVita® HYDROMAG™

YaraVita® HYDROMAG™

Oilseed rape (canola): For a single application, 4 l/ha (1.6 l/acre) at onset of stem extension. For moderate deficiency, 4 l/ha (1.6 l/acre) at 4-6 leaf stage and 4 l/ha (1.6 l/acre) at onset of stem extension. An extra application can be made 10-14 days later for severe deficiency. Water rate: 200 l/ha (80 l/acre).

Read more about YaraVita® HYDROMAG™

Other recommended products

YaraVita® HYDROPHOS™
Canola: For a single application, 3 to 5 l/ha at onset of stem extension. For moderate deficiency, 3 to 5 l/ha at 4 to 6 leaf stage and at onset of stem extension. An extra application can be made 10 to 14 days later for severe deficiency. Avoid flowering. Water rate: 30 to 200 l/ha. Colza: Dans le cas d'une seule application, 3 à 5 l/ha au stade début floraison. En cas de carence moyenne, 3 à 5 l/ha au stade 4-6 feuilles et 3 à 5 l/ha au début montaison. Une application supplémentaire peut être effectuée 10-14 jours plus tard en cas de carence sévère. Éviter la floraison Volume d'eau: 30 à 200 l/ha.